1) A mixed-race person who looks or passes for white and benefits from most white privilege, but does not want to reject his/her ethnic background.
2) A person raised by an interracial or non-white couple who is ethnically white.

1) Chelsea's father is white and mother is black, but no one ever guesses, and she has never experienced anti-black racism firsthand; she describes herself as whixed.

2) James' biological mom is white and his other mom is Asian, but even though he's fluent in Chinese, his sperm donor was white, so he is whixed.